It depends on your use case; each option has its own advantages and limitations.
Sticky session (Rotating):
All packages are traffic-based
The speed can vary
Can keep the same IP for for up to 24 hours or 7 days for selected locations - See Long Session Mode
You can select the Country, State, City, and ISP
ISP proxy:
Unlimited traffic
Generally faster and more stable
IP remains static (does not change)
You can select only the Country
TLDR;
Proxy | You can specify the location | Indicated for sensitive usage | Is cheaper | The IP rotates |
Rotating proxies | Yes | Yes | No | Yes |
ISP proxy | No | No | Yes | No |