Perhaps it would be a more smart idea if we didn't lecture about proofs of other's native linguistic abilities, but in any case, I think you both may be considering the wrong question. The crux of the matter isn't that there are two adjectives involved (here smart and sophisticated); it's that Rathony wants the single adverbial comparator little more to apply to both adjectives, a rhetorical device sometimes classified as zeugma, the combination of parallelism and ellipsis. What's meant is
[1a] a little more smart and a little more sophisticated
and that cannot be accomplished with the inflected comparative:
* [1b] a little smarter and sophisticated
Quirk, Greenbaum, Leech and Svartvik have the following in their A Comprehensive Grammar of the English Language (pp. 462-463):
Most adjectives that are inflected for their comparison can also take the periphrastic forms with more and most. With more, they seem to do so more easily when they are predicative and are followed by a than-clause:
- John is more mad than Bob is.
- It would be difficult to find a man more brave than he is.
- He is more wealthy than I thought.
Periphrastic forms are, however, uncommon with a number of monosyllabic adjectives (including those listed in 7.75 as forming their comparison irregularly [good, bad, far]):
bad, big, black, clean, fair [colour], far, fast, good, great, hard, high, low, old, quick, small, thick, thin, tight, wide, young
They add the following note:
There seem to be fewer restrictions on using the periphrastic forms with adjectives in the comparative construction formed with the correlative the...the:
- The more old/older we are, the more wise/wiser we become.
BUT NOT: *a more old man
Good and bad, however, require nonperiphrastic forms (better, worse) even here.
The example you give fits the context in which fewer restrictions seem to apply to the use of the periphrastic form only partially. Big is used predicatively and followed by than, though not by a than-clause. Perhaps the addition of are could make it more acceptable:
- This camera is no more big than my hands are.
Best Answer
“A is no more difficult than B” means literally that both are of a similar level of difficulty, and in most cases it also implies that neither is very difficult. So, it's rather 1, but with implications of 2.