FWIW here's a summary of two of my bikes:

XR650L with 43 litre tank (ideal, but no longer available) + Touratech hard luggage on custom racks + kick start + all the usual stuff cost £6500 and weighed 240kg fully fuelled with 10 litres of water. 17-22kpl and 150kmh off road (without the luggage). once got 13kpl into 30mph headwind and again at 100kmh in super-soft sand. storming bike! 800-900km range.

XR650R with 28 litre IMS tank and custom rear tanks for fuel (13 litres) and water (11 litres) + rear sub-frame + luggage racks front and rear with ~ 40 litres soft luggage + usual stuff cost £7000 and weighed 250kg+ fully fuelled. 16-22kpl and 150+kmh, but why bother. cos its fun! :-)

the XRR engine is MUCH nicer. the handling is better than the XRL even after the comprehensive mods I made to the XRL at the MX track - damping and springing rates and a bit of geometry.

they use chains and sprockets and tyres and oil at the same rate. both are easy enough to work on except for the ally frame on the XRR. that said, none of us had any bother on the XRRs. the brazed pillion foot rest threads pulled out on the XRL. both have crap seats that are uncomfortable and too high so you need decent bars and pegs so you can ride stood up all day - much nicer off-road, too.

if forced to choose, I'd take another XRR. I'd fit the 45 litre alloy tank that I saw on a swiss website and have the alloy SUB-frame remade in steel. plus I'd use soft luggage on the front mudguard and rear. my "issue" with the XRL is that the biggest tank is only about 22 litres and I find that restrictive.

both are GREAT bikes. both are more durable than the riders. Tim's XRR had 30,000km and two oil changes when we left Cape Town to ride back to Europe in 6 weeks. we were both knackered, but the bikes were fine.

you've got an XRR so you're more than half way there! enjoy the ride!