Yo Samus Imma let you finish, but Master Chief was the best soldier of all time.
Since we're talking dress up, y'all bring up solid facts about Samus's utilities, but here is where she falls short. Master Chief is a soldier, a SUPER-soldier even, and he has had the money from the wallets of Earth's banks, aristocrats, and middle class put into it, so it's doubtful that his equipment is exactly a half-arsed cosplay.
But you don't need opinions, so we've brought cold, hard facts to the table.
The Chief's external shell of armor is manufactured with durability in mind, hence the use of a titanium alloy as the basic protection without use of shield emitters, and can absorb a substantial amount of damage, varying on weaponry utilized. Underneath the primary shell, the body suit that covers most of John's body is more than your basic space-marine undershirt. Much like the exterior, the suit is synthesized with a similar titanium composition, but made more flexible to allow the wearer more mobility. It also acts against certain projectiles as well as keep the heat from plasma-based weaponry from fully compromising the wearer, very nifty for the Chief's line of work and trumps Samus's Zero Suit with it's defensive statistics. Underneath the suit, you have a coating of Hydrostatic Gel, it is added as a type of shock-absorber, to preserve the wearer from specific impacts, a factor that supplies the Chief with an upper hand in close quarters combat. Along with this, the Polymerized Lithium Nibocene Layer, one of the innermost layers, a crystallized compound that performs as a bonus sheet of muscle when electrically energized, adding to the Chief's already formidable strength.
From the basic systems, the suit is outfitted with other pieces of cutting-edge technology. The helmet wields one of the most important pieces, something most refer to as the Heads Up Display. This aspect increases the accuracy of the wearer, assisting in pinpointing targets and telegraphing the opponent's movements with the motion-tracker, allowing for a more strategic combat. An average spartan can run the equipment with minimal friction, but when synergized with an Artificial Intelligence, it is a difficult combination to overcome. The inner padding of the suit supports said AI and allows it to view the soldiers vitals, especially to make use of the Biofoam Injectors if the wearer undergoes any deep or critical wounds, supplying as a temporary fix until a long-term solution can be found. With the AI, the soldier becomes a duo, with the primary human senses enhanced and paired up with a second person to supply extra assistance with reconnaissance of surroundings and even direction if needed.
Since holsters were outdated and proved impractical at times, the magnetic strap system was implemented, making the Chief's current armaments easy to access without the hassle. If the projectile weaponry is not in the cards, the suit wielder's physical strength is amplified further by the Force-Multiplying Circuits, giving the wearer an unbelievable advantage in CQC. The Reactive Cicuits don't assist offensively, instead do wonders defensively, granting intensified reflexes to avoid having damage inflicted to the Chief. Fairly self-explanatory.
That is not the average suit you can find at your local tailor, and is most definitely the prosperous outfit if going toe to toe with Samus. Her Power Suit may be formidable, though by the information we have seen, she is not capable of obtaining victory. Samus's suit does not meet the standards nor the technological superiority that the Chief is in possession of, especially in close quarters, where a SPARTAN-II is second to almost none. Weaponry-wise, the Master Chief has a wide selection, while Samus is granted the basic energy cannon that is much more difficult to aim with, let alone hit with, due to its slow moving projectiles. The power beam is not a major concern, as the Chief is more than capable of avoiding the projectiles, excluding few technicalities and oddball situations.
Summing it up, the super-soldier will take the gold over the bounty hunter.