its not if you bang a quarter
Methamphetamine is actually like DXM, which most here don't realize. There are threshold doses to meth, the more you do, it doesn't amplify the effects, it massively changes them.
Small doses of speed make you able to focus easier and concentrate, an ideal study aid, a nootropic at this level.
Moderate doses make it turn into a relaxing and social thing like alcohol.
As you get to the higher doses, then you get the super-charged energy rush like a concentrated energy drink, this level makes it so it should be actually called a stimulating speed drug, and you feel the need
to move around, dance, talk really fast, get super organized, etc.
Now this is only discussing the amount you do in one sitting. It also changes based on the amounts you do and how frequently you do it.
Most tweakers actually spend most their time in the 2nd category, as they smoke it in small amounts over hours and hours, days and days, which makes it a real couch-potato drug, as if you do it that way, you are super happy and relaxed just to sit and veg out, talking about whatever or just doing nothing. The reason they become "tweakers", is they don't understand this concept and after day one or two, they decide to do a shitload at once because they are crashing, and fail to realize that even though it has a rush you can feel right away when administered, the full effects take about 20-30 or more minutes to feel, so they end up not feeling much and snort, smoke, or inject too much at once, get a decent rush and stop, only to half an hour later, get a truckload of it hit them at once, realize they took too much, and get super amped up and start tweaking out. This is especially true when they are crashing after a few days, because while it allows you not to sleep, you still don't function quite as good as you do while rested, only now you are super energetic while being mentally and physically impaired from the sleep deprivation, so you start twitching, speaking your thoughts automatically, acting like the classic tweakers do, etc, basically you start acting automatically, you stop thinking altogether, either you just verbalize thoughts or carry out actions.
This is the only reason meth is considered so dangerous, because if someone is already fucked in the head and has anger problems or is crazy, but has just enough self-control to hold back normally, gets on a bender and tweaks, they can easily punch someone in the face or do something really stupid they might have just thought, but carried out because in the "tweak" phase, you automatically do shit in a way that not even the worst drunk will do, which leads to hilarious good times and memories being among tweakers, making some beautiful moments when you finally just kiss that girl you like or say to your friend you love him, but also leads to retarded shit like you just smashing out a window of a store for no reason or stealing another tweaker's phone to get more speed and then getting guilty when you crash.
So yeah, meth can be much better than cocaine, but unlike cocaine, it is a much more unpredicatable drug because of its long duration.
Cocaine is pretty much universally a quick rush and fun party type thing (although it can be introspective), but meth is a real rollercoaster ride that will take you from relaxed and chill to dancing and super confident to paranoid and tweaky to going full-out crazy to having the best spiritual awakening of your life to everything in-between, sometimes, even all in the same bender.
Oh as for meth being injected VS smoked VS snorted VS eaten, it really boils down to the initial rush. Banging gives you the hugest rush and smoking the more relaxed steady feeling, but this because the way you do it determines whether you get a big rush at once, a longer duration, and to what ratio you feel it right away, delayed for a bit, or not much till the end.