Suriname (or any BCC for that matter) tend to have a crisper pattern due to the higher scale count. It is like a hi def television has more "pixels". If you consider each scale as a pixel then the more of them you have, the better the contrast will be.
The tail color tends to hold up better over time as well (hence: "TRUE" red tail). With most BCI the tail will dull down with age.
Suris tend to have a distinctive head shape...sort of more shovel like than most BCI.
**The biggest differences are in husbandry and feeding habbits. BCI tend to be hardier and more forgiving of husbandry mistakes and inconsistancies. BCC don't respond as well overall to things like, improper temps, humidity levels, heavy feeding schedules, stress, etc....Once you are used to thier needs however, they are as easy to handle as any other subspecies.
Here are a few examples of Suriname BCC that I like....










Hope that helps...If you are used to looking at BCI perhaps seeing these can show you some of the differences in looks...Good luck on your search 
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