All SCT's are blank. It's just the buyers discretion as to what to put on them. You can only load 3 tunes at a time (on an SF3 or X3). The SF3 comes with canned tunes, occupying three of the slots; meaning you can't have custom tunes unless you remove them from the tuner.
The SF3 and original X-3's Will hold canned and custom tunes at the same time. You are able to store 3 custom tunes and 5 canned tunes, that's a total of 8 tunes stored in the device for your use. The canned tunes are as followed.
Trans only tune
To the OP, the canned tunes are "OK" but they don't compare to a custom tune. Once you try a custom tune, you'll almost never use a canned tune again.
As far as your original question, they are both equal in programming in a custom tune. The only difference is, the SF3 can/will hold canned and custom tunes, and the new style X-3 only holds 3 custom tunes.
If your looking to buy a SCT device used, there are some things to look for.
What to look for when buying used SCT for 6.0
Another thing to look out for when buying used is, sometimes the seller will sell the SCT device with custom tunes already on it. These tunes might not work on your truck strategy, now there are some strategies that are compatible with others, but unless you know for sure don't risk loading them into your truck. You might end up "locking out" your truck, in other words, it won't start or return back to stock so your stuck having to tow the truck to a dealer for the PCM to be reflashed for a fee.
You can read this info from Ken@SCT on post #1.
2004 F350 CC DRW King Ranch
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