Will Hill versus Sun. Which to choose?

[Flintoff]

Hi.

Looking to signup for either William Hill or Sun Poker, and wondered which would be the best.

Looking about, it seems I can get 35% rakeback on Sun. 30% on Will Hill. Simple choice at first glance, but are there any other bonuses I need to consider?
I would be 3-4 tabling £5/10. My MGR would be up to $10K a month.

Any advice from Crypto players as to which would be the better deal for me?

Thanks for any response.