Learning curve is easy-it's nearly the same, but you'll pick it up quickly. Any problems, you know where we are and you know everyone will be delighted to help with even the simplest questions.
As foir new stuff-my spies tell me that stand-alone multitrackers are not a priority for Korg. They've seen that computers are ruling the world these days, and that it is a very limited and highly competitive market, with a race to the bottom, price wise. Expect them to go upmarket, with stereo recorders in superhigh quality recording at 1 bit DSD. They're also doing a great stereo recorder that allows you to overdub as many times as you want. It records in broadcast wav format, and stores all the overdubs as well as individual tracks, allowing you to bring the whole lot into your computer DAW and mix and edit. Clever boys!!
Take a look-
KORG SR1