GT5 offers the better racing experience, with more features that really matter to someone like me, someone that just wants to go out there and race.
The ironic thing here being that GT5 isn't actually that good for just wanting to "go out there and race". You're held back by the awful levelling system in GT Mode, and the Arcade Mode is very limited too (though it does do 16-car fields, which bizarrely rarely shows up in GT Mode).
I'll admit though, the latest super-payout Seasonals have helped with this a lot, as once you're at a decent level, and flush with cash, you can get pretty much whatever you want. But, GT4's Arcade Mode was better, and Forza's is better still for giving the users who are looking for it all-access. Those of us who want to progress, and own our own cars (and tune them) head to the career mode in both games 👍
*insert can you auction house*
*insert can you store front*
*insert can you edit liveries*
*insert can you post global leaderboard times*
etc etc etc.
Storefront? Liveries? Sorry but i prefer tangible worthwhile stuff that enhances my gaming experiences. You know? Gameplay. The focal point in any game. I am not knocking down storefronts or liveries per se. I think they are good additions. But given the choice between racing at night at the ring or a Livery, it's the former every single time
These don't enhance the gaming experience? That's why leaderboards are still one of the most-requested additions to GT, and past the few selected Time/Drift Trials PD gives us in Seasonal Events, have yet to actually show up in the game, a year later.
An in-game economy is pretty handy too (and for proof it's highly desired, look at the Marketplace here). I was stuck needing an R3 car for a series last night in FM3. I could pay the 300,000 to buy it from the normal dealer, or... go to the auction house and look for a deal.
A livery editor would even help PD, as people could recreate cars that PD hasn't done. Since GT does enjoy counting identical cars as separate models, we could have the entire SuperGT field from most years, at least the GT500 class, just from talented painters. Having your own unique car, that you've painted up (or even purchased a design for) is a positive thing for most people. I know I like having my cars look how I want them to in GT5 - that's why PD offers all the colour options in the dealer. And they're obviously not against customization, what with the paint shop and limited visual customization available on Premiums. It's a start.