Radisson goldpoints plus - Park Plaza Riverbank or Park Plaza County Hall?

My husband, 2 year old and I are going to be visiting family in the UK but we are staying a few nights in London. Both of these hotels are offering amazing deals through Travelzoo (http://uk.hotels.travelzoo.com/london-hotels/) but I would like to know which hotel is nicer.

Any advice would be greatly appreciated!