Yes, but if anything, Suzuka should be even better for McLaren than Singapore. McLaren have generally been weak at circuits like Singapore where Red Bull have been fastest all year. McLaren's strength is high-speed aero performance, while Red Bull is best in traction and low-speed corners.
I'm guessing this weekend will look something like this when it comes to car performance: McLaren > Lotus (if hot) > Red Bull/Ferrari > Lotus (if cold)
Dark horse(s): Sauber and Williams.
Isn't Suzuka like Singapore but mechanical grip is less of a priority? (which seems to be one of the Mclaren's weak points this year judging by Valencia and Monaco) and the Mclaren isn't lacking in terms of downforce.
The only thing Suzuka and Singapore have in common is high downforce.
Singapore requires as much downforce as you can bolt on, good braking stability and traction. All corners are 90-degree corners, except for the last corner which is sweeping.
Suzuka requires high downforce, but still good aero efficiency for the straights. All corners are sweeping and high speed, so you need good aero performance. Only two corners require low-speed traction and only two corners require a lot of braking. Hungary is quite close to these characteristics, except that Suzuka is high-speed corners instead of mid-speed corners.
Ferrari are quite weak when you have to bolt on as much downforce as you can, but they have good aero efficiency. Same with Sauber. Red Bull is opposite to this, but they will still be quick.
And Red Bull must've something up their sleeve for this race on the updates side. They haven't brought many updates since Valencia.