Its two different game from the same developer. Of course it would comparable. That said, I be a bit nikky picky on this:
Morrowind PC Setting = A man released out of jail messaged by a Daedric Lord named Azura, to be the said "Nerevarine"
Oblivion PC Setting = A man broken out of jail on favor of the Emperor. Who was only told to give an amulet to someone.
"Prison Ship" =/= Actually Jail. Just saying.
Now, lets say Oblivion and Morrowind took out any hints that they were connected, and they werent named by the same franchise.
How are they similar? They are 2 very different games about 2 very different things in 2 very different places.
You are trying to compare games based on their connection to eachother, not the actual gameplay
This is assuming that these two game are still being made by the same developer. In that case, it is still comparable. When Fallout 3 came out, sure its a different game that Beth is use to making, but it show that it is still comparable to Oblivion in many, many things and people love to compare the performance of the making of these two games. If the game is from different Developer, unless it have the same title, then we would not really be talking about this comparison.
MAIN QUEST (21 Quests)
House Hlaalu Quests 29 Quests
House Redoran Quests 37 Quests
House Telvanni Quests 28 Quests
Fighters Guild Quests 31 Quests
Mages Guild Quests 33 Quests
Thieves Guild Quests 30 Quests
Tribunal Temple Quests 23 Quests
Morag Tong 25 Quests
Imperial Cult 25 Quests
Imperial Legion 19 Quests
Misc Quests 30 Quests
So lets add the Morrowind Quests
21 + 29 + 37+ 28 + 31 + 33+ 30 + 23 + 25 + 25+ 19 + 30
306 Quests, now that may seem like a lot maybe. But lets Consider this..
The UESP says 181, so Im just gonna leave it at that
So, yes Morrowind has 306 "quest"
Made my life a bit easier on counting. Actually lets add in what ya forgot:
Ald'ruhn - 2
Sadrith Mora - 1
Ebonheart - 6
Ghostgate - 1
Gnisis - 2
Pelagiad - 4
Seyda Neen - 4
Suran -2
Buckmoth Legion Fort - 3
Moonmoth Legion Fort - 2
Tel Vos - 1
Ashlander Clan Quests - 5
Daedric - 7
Vampiric – 14
Thats 306 + 54 = 360 Quests total in vanilla.
Oblivion-wise, there 190 quests, not including buying a house, in Vanilla.
Oblivion, You can do all the quests you very well please.
And they are almost always extensive and require work.
So, yes Morrowind has 306 "quest"
But most conflict with eachother
A lot are ridiculously short
So, maybe Morrowind might have more in technical terms. But Oblivion quests have a lot more to offer.
Except many of Oblivion's quest are ridiculous short (many of Morrowind's quest as well, but not as much as Oblivion). To me, Oblivion does not really felt like work as it also included a GPS tracking device rather then one finding his/her way of finishing the quest. Beside, I am the type that does not play all quests with one toon, as it feel a bit weird that my happy to go lucky assassin of the Dark Brotherhood become top mage of the Mage Guilds. With use roleplaying in mind, Oblivion offer a hell lot less for specific type of profession.
This is why confliction make sense in the past Elder Scrolls prior to Oblivion. It give it that feel that one have to replay the game again in a much different style.