What does it smell like?
How does it smell?
I think both of them are correct ways of asking what something smells like. But I feel that there is some difference between them. Can you please point that out?
Learn English – What does it smell like? or How does it smell
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Please note and I would like to point out that... both mean the same thing, that the speaker is trying to bring attention to whatever is going to come after. The difference between the two, as @Dan Bron pointed out in his comment, is that Please note is impersonal, while I would like to point out that... is more personal.
Please note is used when the speaker wants to make it clear that what he or she is about to say is important, and it is often used to give an air of formality or authority.
I would like to point out that... is used when you want to make it clear not only that you are making a point, but that it is you who is making that point. Drawing attention to yourself in this way makes the announcement seem less formal, and less authoritative.
In your situation, your company mostly likely used please note because whoever wrote the email wanted it to represent the company in general, and whatever the "note" is, it should be read as coming from the company as a whole, not any individual manager or employee.
"More difficult" does not necessarily mean "hard".
I will explain using a parallel, around the words "heavy" and "heavier".
- A piece of paper is light (i.e. not heavy).
- A banana is heavier than a piece of paper.
- A helicopter is really heavy.
Now, lets analyze the "banana": is it heavy? Actually, no; nobody would really call a banana "heavy". Because "heavy" is reserved for other objects, like "cement brick" or "helicopter".
It is the same in the original example. "More difficult" does not (necessarily) mean "hard". Maybe it is still easy to learn, but not as easy as other games.
"How hard" vs. "How easy"
Actually, in this context, they are both OK and they mean the same thing. Since hard and easy are not measurable, the answer cannot be really short, like: "42". Ok... 42 what? The answer to these questions is usually an explanation, where the listener can make his own mind.
A very good example from @JasonBassford, posted in a comment (thank you):
Airplanes are very complex pieces of machinery—yet it's very simple for passengers to sit in seats while traveling in them.
Best Answer
The first question asks for a comparison:
The second question asks for a word describing the quality or goodness of the aroma:
Okay, why did I use that last one for both questions? Because everyone knows a cesspool smells awful, so it works for the second question. It's essentially the equivalent of: