You'd almost require another lens to cover the lower range up to 135mm if you go for the 135-400mm.
I think the 135-400mm lens might be an older lens having been replaced with the 150-400mm - however I can not be certain about it but a point to investigate.
Personally, despite the fact that I love the longer range lenses, the 70-200mm is a hands down winner for me

Everybody who owns one has not regretted it and is considered the sharpest non prime lens around.
Good luck

Admittedly, I miss the extra 30mm my old 70-300mm lens gave me over my current 100-400mm lens at wide angle. The difference 30mm makes is amazing.