From a former tweaker I know: smoked meth (or even hotrails) is in an entirely different class, but swallowing methamphetamine powder (capped or in a paper "parachute") isn't noticeably different in peak intensity from the 30mg IR adderall pills, but the meth lasts much longer.

Insufflated meth is higher peak than comparable by weight adderall powder (crushed up pills), but just increasing the adderall quantity makes up for that.