Not even the guys at Digital Foundry missed the opportunity to try the classic PS1, PS2 and PSP of PlayStation Premium, a service whose roll-out has already begun in some selected Asian territories.
Good news first: the PS1 emulator offered by the top tier in the new PlayStation Plus is different from the one included in the disappointing PlayStation Classic. This, however, does not mean that it is without problems. Graphic filters, display modes, the rewind function and the increase in resolution to 1440p are welcome, however the classic catalog includes even 50Hz PAL games, which do not perform very well. For example, Ape Escape appears to have numerous stuttering and frame pacing issues, probably because it runs at 30fps, and not 25fps as one would expect from a PAL game. According to Digital Foundry, which ran its tests on PS5, Sony was wrong to include products in PAL format. This is because the new generation console offers a minimum output of 60fps, not compatible with the 50Hz of PALs, therefore the time spent on the screen of the individual frames varies considerably, generating inconsistency and stutter. However, these problems do not occur for games like Tekken 2 and Mr Driller, which are present in their NTSC editions.
The only PSP title, Echochrome, has no frame pacing issues (the handheld has never had to deal with PAL games), however the upscaled 2D elements are blurry. Nothing new for PS2 games, since in the PlayStation Plus Premium there are the same emulated versions already offered on PS4, with all their problems (the emulated version of Jak & Dexter has performance problems that the original did not have). Unlike PS1 classics, which are offered in dual PS4 and PS5 versions (sometimes with noticeable size differences), PS2 classics feature a single native PS4 version, which then runs backwards compatible on PS5. Watch the video for more information.