I have ridden both 52"/23 hp GS and yes the 60"/26 hp is by far faster. Do not care if your rep said they were the same. When i jumped on both, as i do work for a place i drive them everyday the 60" has more speed and also quicker reverse which is nice lol. I run my business with a 52"/23hp and I know the difference. 60" is quicker and reverse is improved. Maybe it was that one unit, but it shouldnt be.