which lawn mower should i buy, i'm new homeowner?

This is what i've shortlisted.



Southland SM2110 21 in. 139 cc 2-in-1 Walk-Behind Push Gas Lawn Mower-SM2110 at The Home Depot



or



Amazon.com: GreenWorks 25022 12 Amp 20-in 3-in-1 Electric Lawn Mower: Patio, Lawn & Garden