Hi Jerry, i don't know how to describe the difference between tikka and tandoori, only size and the lack of bones in tikka i suppose, for me anyway.
Despite a short marinade of 4 hours and no yoghurt in the mix, the tandoori turned out pretty good, very edible.
For me, the flavour i get from the lasan recipe when done as per destructions, is exactly the same as i remember the flavour of a really good Tandoori chicken leg from a Balti house i used to use in Brum years ago (Hall Green Tandoori, just oposite Ghandi's on the Stratford rd). It really is spot on for me. And besides that i just love the recipe, its a pain in the aristocracy to prepare but well worth the work involved.
Makes a nice naan sarnie with some rabbit food thrown in and a dribble of mint dip too.
Maybe Tikka is slightly less spiced as it is used in context with a sauce ie a main course curry. Whereas Tandoori is mainly served as a starter.
I'll remember that tip about freezing yoghurt, never tried it before, do you know if you can freeze Greek yoghurt, i use the low fat version 5% or something.