Martin123, The Cancers speaks good Birmingham wisdom there, even if it is the Alabama as opposed to the midlands variety.
In a way, you ask a very dangerous question, "which should I buy". How can anyone actually answer that ? Would you be angry if someone's answer was "Don't buy either. Give the money to the starving poor of the Sudan" ? Your question is a bit like asking "which lady should I ask to marry me, Suzette at number 23 or Behrani that lives over in Oakdale ?".
Don't take this the wrong way or think I'm being crotchetty and rude - I'm not. It seems to me that it would be more profitable for you to ask if people had experience of either unit and what they've found to be the good points and bad points. Then do whatever research you can and then make up your own mind. Even asking for recommendations and the reasons why are better than asking what you should buy.
If I've offended, it's not intentional as I see that there might be language barriers. I try to encourage people to do their own research and thinking. So this isn't directed at you, personally, but generally, to any newcomers that might view this.
This bit is, directed at you personally > Welcome to HR !