I know this forum is about cars. However, I felt the forums members and Scottys advice could still be helpful as it's about Scottys favourite engines. 

I'm deciding between two petrol lawnmovers:

Honda HRX 476 VY=£1049
Honda HRG 466 Izzy SKEP=£659

The HRX has a bigger engine [GCVx170] 170cc

HRG [GCVx145] 145cc

Is the extra £390 difference worth it ? Will the bigger engine last longer to justify it?

HRX however, has a Polymer Deck Whereas HRG has Steel Deck. I heard the steel deck is more prone to rust. Would that be the case with steel? And would the Polymer Deck in your opinion on the more expensive one be less durable than steel ? 

HRX has variable speed whereas HRG has single speed