@JoeMama The Hopper and The FW4 are entirely different animals IMO. The 5-6 second massive, suffocating hit you pull out of your Hopper with a slow draw at setting 5 is not possible to achieve; it just isn't, and I've tested this vape in as many ways as possible. You're not going to want to take the FW4 out on the town with you the way you will your Grasshopper, so clear that idea from your head if it's there.
Edit: You're also going to want to restrict the speed of your draw by at least half, if not more when hitting the FW4 vs. the Hopper—think comically slow, and you'll be close.
That being said, the FW4 excels as a home session vape. At heat level 2 with the cooling unit, you will rarely if ever cough and will fully extract with mostly tasty hits for a period of 7-10 minutes. Without the cooling unit, your draw speed will have to be more conservative, and you will have issues hitting native at temp level 4, but I don't see a difference otherwise.
Congratulations on your purchase. Marc's vapes are awesome, and they serve a very specific purpose. For me, it's through water (Temp 2 w/ a bit of concentrate sandwiched between 0.2G coursely-ground blueberryXwhite_widow) at the end of the night while playing Shadow of the Colossus and has little-to-nothing to do with my day prior to that, which is where the Grasshopper comes in as I go about my daily business and make it rain like a Donald Trump hooker's piss stream.
YMMV.