There is a world somewhere between reality and fiction. Although ignored by many, it is very real and so are those living in it. This forum is about the natural world. Here, wild animals will be heard and respected. The forum offers a glimpse into an unknown world as well as a room with a view on the present and the future. Anyone able to speak on behalf of those living in the emerald forest and the deep blue sea is invited to join.
one more thing, you wrote "When you see Amur tigers of that size all the time, it no doubt will have an effect. For you, it's clear that captive Amur tigers are the largest big cats by a margin"
Its not like that, as I wrote, white begal tigers are of similar size. Well, I have seen just 2 white bengals...one was 220 kg weighteed (pure muscle!), the other one was over 250 kg (250 kg weighted at the age of 3), I think that his prime weight is going to touch 300 kg mark.
Difference: amur tigers are definitely longer and with more slim bodies. On the other hand, there are amur tigers who are bear like creatures - overall very robust animals.
When it comes to comparison between amur tigers and lions, Id say, that amurs are obviously bigger, but huge lions are comparable to average amurs. Another difference is that amurs are longer, but lions have more robust bodies. On the other hand amurs have obviously stronger legs.