The difference here is the current protection from "infringement" -- the 2nd will not allow it.
Absent the 2nd, the state could place all kinds of precondition on the exercise of the right - licensing, registration, insurance, training, etc -- and not run afoul of the Constitution, so long as the right. if any, can ultimately be exercised.
Generally true, the right to arms in a state is dependent upon that state's constitutional protections. States without a right to arms provision in their constitutions have seen the most draconian gun control enacted (e.g., California, New York, New Jersey).
The interesting thing is that in those states this could, in the end, work to gun rights supporter's advantage. Since those states never developed a sophisticated legal structure defending their laws they just lazily relied on 20th century lower federal court decisions in which the "militia right" & "state's right" were hatched (see footnote).
In
Heller, all of the various "collective right" interpretations have been invalidated and the gun control schemes that have been upheld by citing --state's / militia / collective right-- are fatally infirm making them easy pickin's, e.g.,
Burton v. Sills, 248 A.2d 521 (N.J. 1968).
As an ancillary argument, speaking just from constitutional principle, the Constitution's promise to the states to forever provide a republican form of government forces some federal protections of rights upon the states and the right to arms is of a peculiar nature.
To look further into what restrictions states are allowed to enact on the citizen's arms, we have a good insight from an early case from SCOTUS.
In
Presser the Court found that the 2nd Amendment did not provide any immunity for private citizens allowing them to assemble and march bearing arms, without permit from local or state authorities. The Court, noting
Cruikshank, (right to arms not granted by the 2ndA, etc), took the opportunity to examine the right to arms on a deeper level,
separate and apart from the 2nd Amendment.
The Court said:
"It is undoubtedly true that all citizens capable of bearing arms constitute the reserved military force or reserve militia of the United States as well as of the states, and, in view of this prerogative of the general government, as well as of its general powers, the states cannot, even laying the constitutional provision in question out of view, prohibit the people from keeping and bearing arms so as to deprive the United States of their rightful resource for maintaining the public security, and disable the people from performing their duty to the general government."
This is a mutual aid principle; neither the feds nor the states can disarm the citizenry because each rely on those same citizens for their defense. Since an armed citizery / general militia is a foundational concept of the republic established by the Constitution ("undoubtedly true" the Court tells us) the federal government can not allow a state to act in an UN-republican manner, disarming the people who the feds and other stats rely on.
The full application of this principle would seem to eliminate the need for incorporation of the 2nd Amendment and to solidify the protection sphere for arms that "constitute the ordinary military equipment" and that "can be employed advantageously in the common defense of the citizens", i.e., "assault weapons" (which it already is,
US v Miller).
foot note:
U.S. v. Tot, 131 F.2d 261 (3 rd Cir. 1942) is where the "state's right" interpretation was inserted in the federal courts and
Cases v. U.S, 131 F.2d 916 (1 st Cir. 1942) is responsible for the "militia right" interpretation.