It's made little easier by the fact taht the closest available competitor is missing some functionality. Not all the buttons work, the FF is apparently not changeable, you can't call up RA menu. None of these are critical deal killers... some people will still make the call "even with the flaws, $300 for a G27 is a better value than $600 for the T500 without even a stick shifter.
But some will say "Screw it, do it and do it right. $600 isnt' THAT much money in the big picture and I don't have to put up with annoying things like not being able to assign every function like wipers and lights and buttons that don't work or having to have a controller around for RA menu"
As I said before, some people openly admitted they were paying $200+ for the SE when the normal game was available for $60 simply becase they were excited about GT5 and now that they finally got the chance to buy it, they were doing it right.
You and I may not be swayed by such thing, but there are some who will be. Look at it this way, would you NOT want EVERY advanatage you could get while trying to market a $600 wheel against a $300 competitor that commes iwth an Hgate? Surely you would... I would even bring up better quality paint or a better cable management system if it exists on the T500... literally make the check list as long as possible with thing that favor you no matter how small.
NOW think about this... what if the G27 was FULLY functional... I mean every button on the wheel works, every function in GT works, FFB fully tuneable... suddenly the G27 actually has a few legs UP on the T500... more buttons available means you can actually program MORE into the G27 than into the T500 (note the T500 appears to have only 6 face buttons and a Dpad which is a pretty low count).
So when people ask on the forums or of their friends "which should I get? G27 or T500" the answer would then be "Dude! The G27 does EVERYTHING the T500 does, it has MORE buttons so you can program every feature in the game, it COMES with an hgate shifter and it's half the price of the T500 before even the shifter! Unless you REALLY want that better belt drive motor or something, definitely go G27. I mean mine works perfectly in every way for GT5 and I don't mind the noise at all and the FFB is plenty strong enough for me."
Now compare that to what we have now "Which should I get?" answer "Well I think $300 for the G27 is a better deal, but I have to keep my controller around and awake just to access the RA Menu, I can't program all the features onto the buttons which is kind of annoying and embarassing when showing off this cool game to my friends only to say 'oh yeah you can turn the wipers on and honk the horn! But I don't have those buttons mapped because I ran out of buttons, but you can do it!' and the FFB is a little too strong/weak for me and I can't make it really how I want... honestly it's just too unpolished an experience and I can't afford the $600 for the T500, but if I could, I might just do it to make my experience perfect."
See how nerfing a few features could quite easily swing some sales?
As I said before, I doubt they are trying to get G27 owners to upgrade to T500 out of frustration or anything, but when it comes time to buy that next wheel (or first wheel) they want the comparison chart to favor the T500 as much as possible to offset the price tag.
Think of how comparing GT5 against FM3 they put a lot of bullet points out there like weather, 1000 cars, time change etc... even if those things had major caveats like 80% standard cars, weather and tim only on some tracks and only in limited ways on many... it doens't matter... bullet points sell. It' marketing.
Basically the T500 has it's own selling points already, but what marketer wouldn't want MORE selling points... even if they are minor? If Toyota could somehow screw Honda into using 1mm thinner door panels do you not think they would so they could say "and our door panels are thicker than Honda's making them more dent resistent and making the whole build more solid"? I mean 1mm thicker doors are not a huge selling point on a $30,000 purchase but if you were a salesman, which would you rather have:
Checkmark next to selling point "thicker door panels"
or
Not have a selling point "thicker door panels"?
It lilke asking "would you like 25 cents or like to not get 25 cents?" It's hardly a big deal, but given the option who would ever choose "not get 25 cents" over "get 25 cents"?
Or imagine we are both selling our cars and I have the opportunity to (without getting cought) put a little dent in your cars hood. Nothing big, still runs fine and all... but it's something a potential buyer will probably notice...
If I did that, it's nt like a little dent is a huge deal, but it might just be what puts them over the edge to buy my car...
Are you seeing where I am going here?