I often stay in both.
Sobieski
+ transport links
+ more modern furniture
+ wider breakfast choice with more made to order items
+ has queiter rooms facing gardens
- poor soundproofing
- no pool
Centrum
+ better location/area
+ more caring staff
+ better restaurant
+ pool
- dated furniture on some floors
- rooms are smaller
- CC welcome gift is only one piece of chocolate that they always forget to bring, unless reminded.