Let's kick off:
1: It's real.
Yes, I know it doesn't affect gameplay but some people who came to World of Tanks for historical reasons might find that a good reason. They could bother with the M551 Sheridan, but no, the T49 will do. M41 Walker Bulldog was produced and used. The T49 used the chassis of the Bulldog. Thats why it wasnt Sheridan. + Sheridan only had the derp gun.
2: It's better looking.
This also doesn't affect gameplay, but really, would you prefer driving a tank where somebody sat on with a drain pipe sticking out of the turret over a tank which looks as American as possible and has a more standard type of gun? On KV-1, everybody uses drainpipe and look how are they doing. Great. Also T49 has red lights, no Bulldog cant handle them.
3: That gun, seriously?
Drain pipe, as I refer to it. 152 mm gun is fun on a KV-2 at tier 6 but I'd not prefer shooting Tier 10 heavies' butts with 76 mm of penetration. Although it splashes, you'd do minimal damage on heavy armor.
Whereas 175 mm of pen with APCR shells as standard seems OK for me. It gives you the possibility to actually penetrate tier 10 heavies. And ofcourse it's not a howitzer, it's a 76 mm gun, making shell flight speed, accuracy and aiming time a bit normal. Not that you'll ever find a T49 sniping. I understand that, but everybody will still use Drainpipe (some only look at damage).
4. It's faster
But they both have a 72,4 km/h top speed? Yes, they have. But the T49 reaches it harder. Don't know why, since the M41 is heavier, but in practice I've overtook some T49's. So? You accelerate at you base or spawn, not where the enemies are (exept if you get detracked).
5. The M41 get's a gun we can work with.
I just said that, but let's go to that in full detail.
T49: 19,9 sec reload. 910 damage if you penetrate, horrible accuracy, aiming time, shell flight distance.
M41: autoloader, 10 shells, 175 pen, 150 damage making a potential burst damage of 1500, which is enough to 1 clip tier 8 heavies, normal accuracy, aiming time, shell flight distance (a faster one, since it has APCR as standard). You are talking about the autoloader instead of the normal gun. So not really great presentation.
6. More...
The M41 gets 4 guns. 1 not so good stock one, 10k exp for the next one, which comes close to the last one.
3rd gun is an autoloader. The one we just discussed.
Don't like autoloaders? You have the fourth gun, which has the same stats as the autoloader, but then as normal gun. With a 3,5 sec reload! Choice for everyone.
T49 only gets 2 guns, the 152 mm gun, which is, not so good, and the stock one. I'd say people would use the stock one, but it's also not very good.
Well, a rate of fire of 9,52 with 320 damage makes up for pretty good DPM but 102 mm of penetration. Take out a tier 4 tank and it has more than that. So this is also a gun for lightly armored targets, but very very lightly. And no splash damage. I kinda agree with that also.
7. ...for less
The M41 is tier 7. The T49 is tier 8. Translation, you'll have an M41 sooner, and it'll cost less XP. So why do you compare these two instead of T49 against RU and T-54 light?
8. But the scouting capacities?
As we just said, the speed of the M41 is slightly better in practice, though on paper the T49 seems to be faster.
View range/radio range? Exactly the same. No reason to pick the T49 because it's a better scout. So why would I liked Bulldog better? It doesnt have better viewrange then T49...
9. Where does this line end?
M41 -> T49 -> T54E1 -> T57 Heavy
OK, you might want to get a T49 to continue on with this line. But then again, I've played the M7, T21, T71 and T69 as well, and they are pretty good. You might want to consider going these ways. So now even Bulldog isn`t good? Now you are comparing branches, not vehicles.
10. Actually everything is cheaper.
We've just considered this, but with a closer look everything on the M41 is cheaper. Tracks are cheaper, turret is cheaper, you don't even need the second turret for the best gun on the M41, on the T49 you do. Radio and engine are the same.4 It is lower tier thats why.
So there you go. My T49 and M41 comparision. Hope it inspires you. It inspired me to fix some things in this.