I'd look at the headstamps to try and differentiate. That's where there is the most notable difference between Super Spark and Super Stripe. Take a peek at some pictures on MM with filter set to show all instead of just for sale and you should be able to see what I mean.
On Super Spark the blushing in the head is a lot stronger and very little of the brown/black should be pronounced in that area. On a Super Stripe, you will have more variation in blushing where some area has pronounced brown/black, some is a little washed, and some is completely erased, usually forming a yellow donut-diamond type of shape.
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