I am regards to bosses, it is possible to buy RS gold farm them considerably more easy and more than in OSRS. You could do GWD1 bosses for as many hours as you'd like without banking as soon as you receive the right gear. New bosses however are a lot more interesting. They have more mechanics tailored to the combat system, and a few have an enrage system that creates a cycle. I would not be concerned about this as of yet, because those supervisors are fairly endgame. The biggest difference with RS3 ironman is that we could associate together for worse or better. It makes it a lot more fun but also removes the prestige of getting your personal drops because some arbitrary fuck off hardcore can leech some of the hardest bosses.
Generally speaking a lot of faster and qol things. Combat shrewd killing things is indeed much quicker. Prayer is done by many irons at vryewatch though I found you get a substantial chunk of the bones you need from big game hunter. Which I have really liked. Runes are far readily to obtain and you do not use anywhere near as numerous. You also don't have to dash things for hours straight. Mining and Smithing are completely reworked and feel good on iron. Woodcutting and fletching are basically exactly the same. Divination is a slower woodcutting until you get to par 75 if train the routine but daily caches enable a whole lot on it.
Fishing includes fresh spots like menophos and bargain sea fishing which make it feel much better. Crafting is through cutting gems trained. Granted I left a substantial number of battlestaffs instead. Farming is favorable with play owned farms. Granted you do need to let the trapper find critters for you or spend time. The ideal thing imo is that every one of the items that you make and craft can before creation sit in your own bank for part. Invention is wonderful for getting rid of junk that's usually not useful to alch. Should you made rune arrows to train fletching then you can disassemble those for comps to make perks or machines to just accelerate RuneScape game.
The biggest difference is that RS3 iron is almost completely focused on PVM, which is ironic because nearly all RS3 irons leech their equipment. This to me is a highly inaccurate description... entirely concentrated on PvM is totally wrong, as you require very high levels in so many distinct abilities to get the slightest chance to do lots of high level pvming... for instance, 80+ craft, div, and smithing for innovation to be unlocked, 90+ herb for overloads, arch to get pvming relics, higher fish/cook to acquire adequate food, high levels of farming to get intense containers for div/invent/etc. In my own experiences, I just did perhaps 1-2 hours of pvm skilling the time I had been under 2500 26, for each 9-10 hours.
On top of this, there haven't been many ironmen that leech their pvm equipment in my own experiences. Most folks will not even take lower leveled irons to supervisors, let alone let them leech. It would ruin RuneScape gamemode for people, so I'm not too sure where you got this thought. A good deal of player owned content in RS3. RS3 ironmen will not have to compete on unfavorably ground with regular players the majority of the time.from my experience, ancient RS3 ironman is much simpler than OSRS, osrs you basically are playing yourself for your stuff, it is far slower to cheap OSRS gold maneuver around.