Hmm I got SLH by clone so maybe I didn't have to go through the hermi thing but so far I haven't had any hermi on me. I haven't grown the warlock, to tell you the true I don't know much about warlock, seen the name around, that's about it... but I've never heard anything bad about the high from SLH, every post I've read about it said it's the real deal. I have some SLH going right now, it's my 1st time with it and it's not too far from finishing up.. I will say it is a little sensitive on the nutes, the sativa pheno in particular. So I often watered my other plants with a stronger mix then added more water to the batch before watering the SLH. Oh the Sativa pheno is harder to clone, one of the longer to root plants I've had, the indica pheno clones quicker.
I guess if you're ordering seeds and you can only afford one of the two I'd order the warlock and then check craigslist and get a SLH clone from a MMJ patient grower (if you have your card that is) I don't see warlock very often but SLH shows up on craigslist fairly often in my neck of the woods. Then you can try both. I'd try both, grow them side by side even better.