Hi,
To tell the truth, not really, look at
http://www.bengalcatforums.com/forums/viewtopic.php?t=777 - Paddy's kittens in the gallery, or look at some Bengal kittens on breeders websites.
The ones you have found are lovely little kittens though, two are classic tabbies and two are tabby and white. I particularly like the tabby and white ones.
You obviously want a Bengal but are for some reason trying to get a cheap lookalike.
If it is a question of money, then I see your point paying £300-£600 or more for a pet cat is not affordable for everyone.
If I were in your situation then I would have one of these lovely kittens, look after it, love it and forget the maybe/maybe not Bengal element.
Or
Contact Bengal rescue and see if you can find a purebred Bengal who needs a home, many through no fault of there own, some are retired breeders, some are cats whose owners have had a change of circumstance, moving abroad, divorce etc. Many of the posters on this forum have rescue Bengals. Bengals needing homes are all up and down the country so there is bound to be some near you. Many rescue cats are just desperate to find a home to call their own.
(Don't be put off by homing an adult cat, kittens are only kittens for a very short time, an adult cat will love you just as much, if not more than a kitten, kittens often have their own agenda and spend their time finding out about the world and not really thinking about you, whereas an adult cat will seek you out and snuggle up to you.)
If it is not a question of money, then get yourself off to a good breeder and buy a proper Bengal kitten.
Elsa