A quick check of CONSUMER GUIDE lists a Cub Cadet 2654 54" Riding mower and a White 2550 54" Riding mower as virtually identical units. The CC's MSRP was $99.00 more ($3498 vs. $3399). I believe CC offers a broader range of products, including some CUTs, to promote a robust line of equipment. However, if you compare apples to apples, I believe you will find minor differences in comparable tractors. Both brands have been bought up and no longer represent their original brand holders. It's all about marketing now. Based on the CONSUMER GUIDE information and the size you ulimately choose, you will not go wrong purchasing either one.
OrangeGuy