Those garage shots are the GT5 level. The racing shots are the GT4 assets on an updated engine, IIRC. So we should be looking at the garage cars in game, unless they were extra-nice 'in garage' models similar to GT2's, which were far nicer in garage than racing. Whatever they represent, the actual game should look loads better than the racing scenes as that was a 'quick rendering engine' using old assets, and not a refined and optimised PS3 engine. Given GT's heritage I expect GT5 to look absolutely stunning!