Mordaunt Short MS902 and MS902i, is there really much difference?

[alienmuppet]

I'm currently debating whether to replace my MS902 front speakers with MS902i's as I've heard they are meant to be a bit better. My question is, would it be a worthwhile and noticable upgrade? Has anyone compared the 2 properly?

My center is a 905C and rears 902's but I'm not going to worry about upgrading the rears.

If it makes any difference, my amp is a NAD T752.

Thanks!