Earbuds are closer to open backed headphones than IEMs per se, as the former have zero seal. So generally, there is no isolation and loss of sub-bass, but you get a big soundstage compared to most IEMs. IEMs may have more sub-bass and may have more micro-detailing, but the soundstage is quite confined to in your head. Different pros and cons between the 2 transducer types.
Some earbuds also come in crazy high impedance/low sensitivity, so they may be harder to drive than traditional IEMs. One good thing is that earbuds are generally cheaper than IEMs as they mostly use single DD. So budget earbuds are considered to be sub $20. $20 - 100 USD is actually midFI for earbuds. And seriously, TOTL earbuds can be considered from $100 USD.
The Yincrow RW2000 is considered one of the gatekeeper TOTL earbuds in the Headfi earbuds thread:
https://www.head-fi.org/threads/earbuds-round-up.441400/ (you can go talk to the friendly earbud addicts there!)
I have a RW2000 too and it is very balanced, U-shaped, excellent timbre. $89 is a good deal for sure. But I'm not sure if you would be keen to try some budget/MidFI earbuds before diving straight in to a TOTL earbud haha? But that is good in a way, you can hit the good stuff first and don't waste money buying pokemon sidegrade stuff, though sometimes you might miss the journey of experiencing these lower cost goodies!