Mavic CXP22 or Shimano RS10 or ?

To cut a long story short _ Specialized have offered to replace my standard fit CXP22 wheels from my 2011 Tricoss Sport, due to problems with rusty bearings on originals.
They have offered to replace them with Shimano RS10 wheels or will offset the cost of these against another set of my choice with me paying the difference. Problem is I can't afford to pay for better wheels ( perhaps max budet of £50).
My question is - are the Shimano RS10 wheels better than the Mavic CXp22? Are they lighter,roll better, etc.
They certainly look nicer.
What should I do - take the Shimanos? ask for CXP22's again or something else?
What about MAvic Aksiums?
They have offered to replace them with Shimano RS10 wheels or will offset the cost of these against another set of my choice with me paying the difference. Problem is I can't afford to pay for better wheels ( perhaps max budet of £50).
My question is - are the Shimano RS10 wheels better than the Mavic CXp22? Are they lighter,roll better, etc.
They certainly look nicer.
What should I do - take the Shimanos? ask for CXP22's again or something else?
What about MAvic Aksiums?
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Rusty bearings just means they weren't adequately greased or maintained - so ask the LBS to pack them with more grease or do it yourself before you fit them.
Also currently running Vittoria Rubino pro 25's.
I ride all year round, much of it on pretty dodgy country roads / lanes
Never taken a spoke key to them. Which is a good job, since I understand the nipples are an odd size.