2's systems are retarded come on bro. It's about endless grinding spells that take forever to level up (you literally have to grind them to get them to be useful to begin with) and beating the crap out of yourself to optimize success and power. Sure it's better than no RPG systems as there is some interesting strategy and choices involved (which spells to focus on grinding in favor of others), but it's not ideal. It's also pretty damn simple. Sure most aspects of what is present can be defined as you please but there isn't actually much there, e.g FFV has like 50 command abilities. How many command abilities in 2? I don't recall any, just base stats and magic can be influenced.
As for linearity, FFV overworld and progression is quite railroaded until world 3, where like FF6 things get very non-linear. I don't remember 2's level of linearity in detail, just that it was pretty linear and overall a bland asf game across the board.
Here is what I remember, correct me if I am wrong:
Overworld:
FF5: Pretty linear until late game. However, there are some hidden encounters of relevance (summon spells to obtain, blue magic to obtain). Late game opens up a lot. Has the occassional optional location early game like Jachol Cave. Occasionally, there will be puzzle elements to overworld navigation, such as how to access locations with the submarine.
FF2: Linear asf. Every new region there will be two locations to visit. Overworld has little relevance (no puzzle element to it, no hidden encounters to learn blue magic, no hidden locations like the void town or cave where dude tells you your stats).
Towns:
FF5: hidden passages, people to talk to hinting at optional content, pots and such to interact with for items, and so forth. Nothing amazing except maybe the town of the void, but nice.
FF2: complete garbage. The absolute bare minimum.
Dungeons:
FF5: Many absolute masterpieces, as well as some otherwise nice enaging level designs. these are as follows: Fireship, Lonka Ruins, Pyramid, Exdeath castle, Istory falls, Library of the Ancients, Ship graveyard, Deep Sea Trench, Mua Forest. Lots of unique gimmicks, complex layouts, tricks and traps, hidden passages, puzzle elements, optional encounters, really great stuff that set new standards for the series.
FF2: the standard mazes of OG FF. Fairly engaging navigation and attrition tests, but rarely if ever did anything beyond that.