I’ve only started to knowing cognac. And tasting with Olivier Paultes is a best way for this.
Hennessy VSOP - is a good cognac with perfume notes. It’s smooth, easy drinkable. It could be better for bars, cocktails and parties. Cognac for starters.
James Hennessy is a old school cognac but in modern dress. Good cognac for daily drinking.
Hennessy XO is a classic: chocolate, spices, pepper and leather could be a good pair for cigars. I think it’s a cigar cognac.
Hennessy Paradis is a perfection in the glass. Fruits, exotic fruits, chocolate, leather, tobacco, honey, spices, vintage furniture change each other by time wavily, putting you in paradise. Paradis is a cognac for long drinking with great pleasure.