Yes, I know it sucks. I actually made it from the Su-37 Terminator. Here, have a comparison ( that screenshot is before I fully fixed the lighting, aparently ):
The main advantage of the Su-53, if it ever makes into the mod, is the new engines, allowing it to reach Mach 2.7, and a radar, making stealth on aircraft such as the F-22 useless. The Su-53 might possibly be the first fighter to utilise such a radar. Like I said, if it ever makes it into the mod, since I'm not too satisfied with it ( and no, not because of the ugly paintjob ).