What's the better option to buy? I am about to get myself a hybrid bike, but being tight on budget (~ 200USD). I didn't really have many options to choose from. I'd initially thought of buying this particular bike, Mach City Munich after reading good reviews about it online, but it's been unavailable for the past month, without any surety about when it will be.
So, the shopkeepers suggested I get myself another bike, named Montra Downtown.
I live in a city where roads have potholes and bumpers more frequent than lighting poles, (but not the kind that'd require an MTB).
The bike will primarily be used for commute (~15 kilometres, 6 days a week), but I'm also thinking of taking it out for long rides (about a hundred kilometres or so) on weekends.
Both of them have a triple chain ring system.
Downtown has an alloy (6061) body with a steel fork whereas Munich has both the body and fork made of steel.
Both of them have a 21 speed system with triple chain ring system.
Downtown has Shimano TY300 whereas Munich has TZ40 rear derailleur.
Munich has Shimano TX 50 where Downtown has Shimano TX 500 front derailleur.
Both have Shimano easy fire shifters with integrated brake levers, with Munich having a three finger braking, and Downtown having a two-finger.
The brakes, however, on Downtown are disc brakes, whereas on Munich are V brakes.
The cassettes on both are the same too.
Downtown mentions BB Cartridge-Sealed Bearing-Cold Forged Boron Axle, Plastic cups, Steel Body for the bottom bracket whereas nothing is Mentioned for Munich.
I've never ridden a bike with gears as of yet, this will be my first time.
I'm confused between which one to buy for a multitude of reasons. I've been told that a steel body has a give, it flexes, which allows for a more comfortable ride in a place that has roads that aren't very smooth, which does not happen with an aluminum (alloy) frame.
I've heard that disc brakes are harder, require a lot of maintenance and are more expensive to maintain compared to V brakes too.
Downtown has alloy rims, double walled. Munich previously had &quot;double walled rims&quot; specified but currently their website only says that the rims have an ED black finish so I'm not sure if they still have double walled rims.
The bike will most likely be stored about two storeys high, where it'd need to be picked up and carried through the staircase.
And last, but not the least, the cost of Downtown is about 20% higher than Munich. (both are in the budget nevertheless).
If I buy Munich, is it a good idea to swap components and use? For example, the rear derailleur?
Moreover, since I've chosen to buy a rigid bike (because my limited scope of knowledge tells me that a suspension frame with such a low price tag will only be a pain), is adding a suspension seat post a good idea?
Ultimately, you're comparing two entry level bikes.  The differences are small and mostly irrelevant.  The one thing that really matters is how they fit you - ride both and figure which one is more comfortable to you.  So bare minimum is to get a leg over each one and ride it around.
Most bike shops will let you pedal around, which is enough to rank them in immediate comfort.  If you're buying online, then you're stuck and have to make the best guess you can.  This is one reason for buying from a real LBS and not a boxmover.

This question is pure shopping and is off-topic for Stackexchange, because there's virtually no chance of this question being useful to anyone else.  For example, neither of these bike brands exist in my area.
The transmissions are Tourney grade, which is shimano's second bottom groupset in terms of cost or quality.  It will work fine, but comparing variants is like comparing pebbles in a stream - in detail there are differences but up close, they're all much the same.
And no, if you were asking about expensive top-end bike comparisons, that would still be off-topic.