Do the funds have the standard expense ratios that you can pull up on the web? Are there additional 401k fees that are taken out of employee accounts??
The Spartan funds are pretty good from expense standpoint (if rack rate); not as cheap as you could get in a Vanguard IRA, but better than many 401k plans. The new 401k's investment descriptions are insufficient to tell what funds you have available and what the rack rate expense ratio might be--you could be looking at anything from better than Spartan to above 1%. You should have been given the expense ratios when you signed up for the new plan and chose your allocations--and/or the information is available on the online portal to your new plan.
Your best approach probably is to do a table with three or four columns for each potential provider (Old 401k, New 401k, Vanguard IRA, and ______ IRA), and a row for each type of investment you want. The expense ratio for the particular fund should be placed in the pertinent cell. That'll give you a quick and easy way to line things up and look at them when making your decision. Generally speaking, it will typically be best to roll out to Vanguard IRA, but you don't know for sure without comparing the numbers.
(BTW, saw you posted these questions over at bogleheads too. You'll get good feedback there--but, like here, you need to flesh out the investment choices and costs to get informed commentary. Also, as one of the responses over there indicated: Don't feel like you have to rush this process.)