Well, Frans, for starters let me give you their respective weights.
SD = 148 grams.
Sub/Date = 135 grams.
As you can see, there's just an additional 13 grams on the SD....so the weight factor would hardly come into play.
Since you're not overly concerned about the thickness, the SD would be a nice way to go.
Cheers and good luck - JJ
PS: If you want weight, you should wear my pumpkin - 222 grams...whew!!