I've had a Leupold 8.5 - 25 (not mk4) on my long range precision rifle since KevinB and me used to go out and scare targets when he was still in town. So that's 10 years now, and I still love the optics. I utilize the .25 dot on fine hair reticule. I haven't been able to determine the need for the mil dots for myself, as I shoot on DCRA targets, on known distance ranges.
I like the reticule because it is the least obstructive, least "busy", one I could find.
I don't think I could add any more to what's already been said regarding Leupold's glass,,,, great. Return to zero,,, great. Ease of operation,,, great. Eye relief,,,, don't notice the difference when I'm shooting as I'm too busy watching the target and pressing trigger at the movers. That's about the only time I've actually turned the scope down from 25X, is with the closer movers. And again, Leupold and Korth service, from what I hear cause I've never needed it, are good. Price about $1000 less than a comparable NF scope.
I also have a 2.5 - 10 Night Force on my service rifle. I picked it up about 7 years after the Leupold. It has mil dots, and if there was some way I could "clean" up the picture, I would. I personally have no need for the mil dots. I like the NF glass. I wish this NF scope has a better come up reference lines on the turrets. And because this one doesn't have the zero stop, can be a pain.
The glass is great. LCF on a service gun, great with the ADM mount.
I think the Leupold scope would physically be a bit smaller/lighter than the NF of same magnification.
I've used both scopes in low light and with a good NV mounted on the eye objective. There isn't a huge difference in my perception of light gathering with either set at the same magnification.
Soooooo, if you're asking - if you are stuck on a higher magnification scope, ie. 25X, I usually go with I like the best and not necessarily keep lower budget in mind. If I want it, I get it. And those are what I got for their uses. Saving a $1000 was just a side benefit.
I would do exactly same today, as I did before, and buy another Leupold.
My .02c