I can't speak to either of those, but am curious as to why a leg holster in the first place.
Quite honestly, your mileage may vary depending on what your experiences or your expectations are.
A holster is only a method of securing your firearm when it is not in your hand. If you had no holster and a .38 Special you just 'acquired' like in the movies or whatever, where do the actors put it? Typically they will lift up their shirt, and tuck it in their waist band. In a
pinch that is a great spot if you A: have tight pants that can hold up the weight of a 1.5lbs handgun, or B: have a fat gut and ass that can help keep that gun from flopping around when you move. Honestly though, that is the movies. You might shoot your dick off in RL if you try that crap and gotta work or move around with that gun in your waistband.
Before you order anything online just take your pistol or revolver down to a retailer that might have what you are looking for and see if it is a good fit.
Any holster you choose needs to be appropriately sized and shaped for your weapon. Make sure that if you have any attachments or intend on attaching anything that you account for those changes. I say that because even though those sites seem to offer a variety of sizes, maybe your weapon isn't on the list. I know my own Springfield wasn't on Blackhawk's list, but is on the Safari one. The Blackhawk also doesn't allow for ANY attachments. Just be thorough.
While a Drop leg holster is a very obvious indicator that you are carrying, in my honest opinion it is the best way to carry when you don't care who knows it.
I am prior service with 12 months in Iraq from the invasion of '03 through '04. Soldiers carry so much gear that carrying a pistol in a typical waistband holster would never work well for us. It needs to be attached to the outside of our web gear, body armor, or, as the Army supplies to us, a Drop Leg Holster. It keeps the weapon safe, secure, and not pointed at our vital groin area if it accidentally discharged from a fall or when pulling it out of the holster. If you will be carrying anything like load carrying equipment with pistol belt/canteen, a bullet proof vest/body armor, or a backpack/rucksack, I highly recommend a drop leg holster or a holster that can attach with clips to the outside of your body armor. All the items I listed above will hang over your waist/belt area and make carrying a pistol there uncomfortable or impossible.
Hope this helps.