I believe they both 爱情 Bella fervently. However having 说 that, the 爱情 that Edward has for her is 更多 profound. He evens describes it as being close to imprinting. Which is what Jacob faces later on which someone else. (Sorry to those who haven't read breaking dawn) Therefore its impossible for Jacob to 爱情 Bella 更多 than Edward.
I think edward does 爱情 her 更多 even though they both 爱情 her alot.But I think that since edward has been living for 更多 than a 100 years and he never fell in 爱情 intill he met bella,and he dicided to get married and live with her forever he must really 爱情 her.Also he left to like protect her even though he really loved her.And I mean jacob imprints and he didn't imprint on bella so it wasn't the person for him.So yea Edward:)
before jake imprints i think that he did 爱情 her and would do anything 4 her but as edward did say jake might imprint someday (as he does with bellas daughter!!!) and he might break her 心 so i think that its not so much that edward loves her 更多 just that he would never have 2 put her through that.