nice pics Whandsy, I don't like spinach so can't comment on the Saag but the Jalfrezi looks to me like, well a Jalfrezi. Variations are always interesting topics for discussion. For example I often feel, based on my experience of eating curries in England, that curries in Scotland, where I live were always a bit spicier than those in England, well Yorkshire anyway where I have eaten many times in the past.
However I would also point out that curries vary within a region or a city from restaurant to restaurant. For example on Wed evening my girlfriend and I went to one of Dundee's best and longest established restaurants, The Balaka. She had a Chilli Masala and I had a Punjabi Masala. In both cases we found the curries to be swimming in oil which was disappointing. The Punjabi Masala (which I've posted a recipe for on here) was served as a whole breast of chicken, covered in sauce. Now I've eaten a PM in many places in Dundee and never had it served like this. It's always been chunks of chicken.
So variations?
I think we have to expect them as a matter of course.