I can't speak on the endura cut, but I do have a Seiki (Chinese "plotter"). It's a 38" machine that pretty much fell into my lap for about $50.00. Hard to pass it up, and I got 3 rolls of vinyl (10 yard rolls) and premask (probably about 74 yards left on it) for that $50.00 too.
All in all, I feel it was a good deal.
BUT my main machine is a Rolad GX-24. I love it.
The main differences between the two:
Cannot cut a straight line. It's "straight-ish". What I mean is, if you cut a line with it and go in tight to examine it, it's actually wavy.
Every now and again it will forget to raise the blade and cut through what you are trying to plot which just wastes that material.
The pinch rollers; I don't care how much you tweak em, they don't grip properly. If you have anything more than 2 feet long it starts to offtrack.
Oh, and it leaves a horrid pinch roll pattern on the vinyl, like tiremarks on the underside.
Some of the parts inside are plastic instead of metal. Seems to me like it would be prone to breaking fairly easy.
The instruction book, while in english, is vot translated very well.
"If vinyl discrepencies does you show not good ajdust rollers of the pinch outward and close again." what the hell? word for word, i cannot make that up.
ZERO support for it. If it breaks, you MUST be a fair amount mechanically inclined.
It smells like a skunk (he told me it was like that from day one of taking it out of the box).
the plotter pen is actually a ball-point pen placed inside a blade holder.
You cannot attach it to your machine via USB (you can but you get all kinds of strange cuts when you send your work to cut).
It has no way to measure between the pinch rollers so you have to use a tape measure to adjust the distance, and manually set it to origin point after each cut.
I think that gives the basic rundown.
All in all, we use it for little "yahoo stickers" (I call the people that want stupid stuff like calvin pee, or a butterfly, or a dragon, or something like that to go on their vehicle a yahoo).
For that it works fine, it's something I can get done in 15 min or less and I'm $15.00 richer. In essence I use it to take care of all my scrap vinyl.
For high end applications like putting a magnet together, or lettering for a commercial vehicle, vinyl for coroplast signs or banners, I use my Roland. I know it won't cut through my vinyl, it won't leave skid marks on the vinyl, etc.
Is that kindav the type of comparison you were looking for?