Yeah but anytime you are number one it is based on the previous 52 weeks, hence I don't really see that it's better to be number one from jan-dec in that order, than say jun-may in that order. I'd rather be the player who spends a longer time being ranked number one rather than being number one at the end of the year one more time.
Plus being the year end number one suggests that you were they best player for the majority of the year which doesn't have to be true. For instance in 1995 Sampras spent 22 weeks as number 1 and 30 weeks at number 2, he lost his top ranking in April and only gained it back on the 6th November just in time to secure the year end number one. He wasn't the best player in 1995, he just had good timing. I also find it more impressive to hold on to your number one ranking for longer rather than lose it and happen to regain it in time for the end of the year. I think Sampras only spent 2 years as constant number 1 (1994 and 1997)
Anyway we don't agree, but I think both players definitley points in their favour, though I think year end number ones are more about timing.