Question 1

Plasmas, Reactions and even Syntheses are PPG canopies commonly chosen by competitors. Does it mean that these are more difficult to cope with or less safe than recreational paragliders of other companies and that only experienced pilots can allow themselves flying them?

Absolutely wrong. PPG competitors are more and more often flying reflex wings because of their greater safety, especially at high speeds. While in everyday use it's a pilot who decides when to fly and when he should rather abstain, in a competition he is sometimes forced to fly in conditions he rather wouldn't try at home. If you add to that a natural competitor's wish of a good result, making him trying to fly faster (or slower), with more agility and precision than ever, it becomes clear that competition wings should be as - or even more - safe than those flown just for fun. Only on a safe paraglider you can commit yourself fully to a complicated tactical/navigational task.