How to ask "What is the difference between" in Russian A common question is "What is the difference between X and Y?". For example, "What is the difference between жаркий and горячий?". I think it might be something like как разница между or как отличается or что отличается. What is the best way to ask this in Russian?

Can I study more than one language at the same time? I am currently studying Russian (for seven years).  But next year, I am going to Berlin for a week.  I studied German many years ago.  Can I start German lessons on italki at the same time as I study Russian?  Or should I stop studying Russian for a while and only study German?