Is ground upper turkey thighs the same as regular ground turkey?
What really matters is the fat content.  I suspect that being all thigh meat, it's similar to regular ground turkey, which is 85% lean.  Ground turkey breast (or "extra lean" ground turkey) is 99% lean.  I've also seen mixtures in the store of light and dark ground meat that clocked in at 93% lean to split the difference.  Jennie-O, a large national producer of turkey, makes all three varieties (http://www.jennieo.com/products/collection/65-Ground-Turkey).  You can check your nutritional information against theirs to see where your ground thighs fall on the spectrum.

Just check the fat content and use it in a recipe that works with that fat content.  In fact, it's probably ideal for something like a turkey burger which definitely needs the fat in my opinion. ;)