Either or to be honest - as long as you have you lessons in Bulgaria you will do just fine. Only danger of a dry slope is the chance of some pretty nasty injuries if you fall - been said here before, if you are going to get hurt, best to do it on a snowy mountain with cheap beer than on a dodgy dry slope here.
Don't go on dry slopes for at least six weeks before you go on holiday. The problem with dry is that so many people break hands / wrists - I've seen it happen... not pleasant and doesn't half ruin the holiday as they won't let you ski or board if you're in plaster.
Go for the snow - it also gives you a much better feel for what it's really like and for the couple of quid more, it's worth every penny - I'm going to Milton Keynes over the Xmas break as I've not been allowed to ski since ...
Don't go on dry slopes for at least six weeks before you go on holiday. The problem with dry is that so many people break hands / wrists - I've seen it happen... not pleasant and doesn't half ruin the holiday as they won't let you ski or board if you're in plaster.
Go for the snow - it also gives you a much better feel for what it's really like and for the couple of quid more, it's worth every penny - I'm going to Milton Keynes over the Xmas break as I've not been allowed to ski since early September for 14 long weeks having had wrist surgery
My (then) 6yo daughter had a couple of lessons at MK last December before going to Bansko for the first time - if at least you get the feel of what it is like to have boots and skis on and have a small snowplow that just gets you a bit more confidence before hitting the mountain proper
I learnt on dry ski slope. I never injured myself once and I still go to top up the leg exercises, BUT I have been 4 times on snow and cracked ribs on 3 occasions and knackered my shoulder on the last.