Shimano shifters

I got some good advice around my last question about going from 3x10 to 1x10 and I've got another question, possibly a daft one!
On my xcal 9 it's running shimano sl-m610 shifters front and back, and with me looking to go 1x10 will be alright keeping the same rear shifter or should I look at changing it?
What's the actual difference between the different shimano shifters barring price?
Thanks
On my xcal 9 it's running shimano sl-m610 shifters front and back, and with me looking to go 1x10 will be alright keeping the same rear shifter or should I look at changing it?
What's the actual difference between the different shimano shifters barring price?
Thanks
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Posts
you also have to change the mech the cassette and the chain.
Parktools :?:SheldonBrown
Is it worth changing the shifter running 1x10 or will it be ok? What's the diff between the 10 spd shimano shifters, just cost and weight?
further up the versions the lighter things get. sometimes the feel changes.
Parktools :?:SheldonBrown