If you want a full suit, get a full suit, all at once, it will save you from possible dye lot changes (different batches of fur are sometimes slightly off in texture or color, noticeable only when you put the two furs together).

As for the merits of one vs the other, A partial is good if you want a smaller head/suit and is obviously much cooler, and allows you to wear different outfits you already own.

But, especially with the looks of your chosen artist, with the larger toonier heads you will be better off with a full suit, as it would likely look unusually large to the rest of your frame.

There is also the cost differential to consider, but I feel that if cost is an issue when commissioning a fursuit, you should probably wait awhile and build up a fursuit fund to where costs aren't an issue.

But in the end, it's up to you.

Oh true, I didn't even think about the dye issue

I've been lurking in fursuit communities for years.

Awesome Im getting mine from them too, i think you should go for the partial first and make sure your comfortable with everything,then get the body suit~ but hey its totally up to u lol :)