Om5 a worthy upgrade?

Hiya, I currently shoot on an em5 mark 2 which I absolutely adore (and regardless of my decision I will keep), but I have recently been tempted towards an upgrade. A local camera shop has the om5 on discount and is only ~£100-150 more than a good condition second hand em5 mark 3. Is the om5 a worthy upgrade? I'm especially attracted to the upgraded sensor to my current model. Thanks for any advice.