The 4-16x50 Mamba will fit on a 97kt - I had one on my synthetic and what a scope! depending how far back you mount the scope according to eye relief, the objective lense may overlap the loading bay, making loading a pellet quite fiddily. I have my scopes mounted quite far back so it wasn't a problem for me.
as for mamba lite, I have the 4x16x44 and its a really good scope, seems to suit the hw97kt very well (and perfect fit in medium mounts), as does the panorama 4x12x50 in high mounts
the whole hawke vs mtc is down to preference, but all of the scopes I have mentioned are great quali