No. The Otari 5050 sound is more focused and modern when compared to Studer A810, Studer sounds bigger and more open but it’s personal preference IMO.
What makes the Studer A810 desirable is it is the best tape handler of all the compact machines. It is extremely gentle on tapes, very well built, sounds great, modular, lots of parts remaining in case something goes wrong, has a professional pedigree, and it’s a Studer.