Curious lang bro, why are you considering to sell your Everest only after 1 year of ownership? Reason of parking space might only be secondary reason.
BTT, between the Pajero and Explorer, best you test drive both. Personally, I would go for Explorer as you already have diesel Everest (kind of redundant with a Pajero).
But if you will open to other options, give the Mazda CX-9 a test drive as well. Among Pajero, Exporer, and CX-9, I would lean towards the CX-9 for better value overall.
Good luck! Let us know what you choose in the end.