It is all relative isn't it ?
Bevan scored 3922 runs in 90s (60@77)
Tendulkar scored 8571 runs in 90s (43@87)
Purely as an opener, Tendulkar scored 6270 runs (49@91)
Here is how I will put it.
As an overall batsman in 90s, Tendulkar would be just about better given the huge sample size, though it is really close. If you are comparing them in their preferred positions, Tendulkar as an opener is better than Bevan the middle order bat, though Bevan wasn't all that behind. Someone who could average and strike like that is gold.
When I meant Bevan wasn't a step up over Lara or Ponting, I meant whole career. Stephen brought 90s into picture after that.
I rate Bevan very highly as well but Stephen seems to massively overrate him