String comparison
Vortex vs Plasma HEXtreme
Prince Vortex against Signum Pro Plasma HEXtreme: ratings, specs and which one fits your junior.
The short answer
Both are polyester strings. Vortex leads on power, comfort and durability. Plasma HEXtreme leads on tension hold. For a junior with arm concerns, Vortex is the safer choice. Vortex costs less per set.
Ratings
Power
Spin
Control
Comfort
Durability
Tension hold
Ratings are on a 1–10 scale. The higher score is in bold when they differ.
Pick Vortex if…
- You want more power (7 vs 6 out of 10)
- You want more comfort (7 vs 5 out of 10)
- You want more durability (8 vs 7 out of 10)
- Arm comfort comes first (arm friendliness 3/5 vs 2/5)
- You want to spend less (from $7 vs $10 a set)
- Best for: juniors moving to their first poly
- Best for: spin-oriented baseliners on a budget
- Best for: players who restring often
Pick Plasma HEXtreme if…
- You want more tension hold (8 vs 5 out of 10)
- Best for: maximum spin seekers
- Best for: heavy topspin baseliners
- Best for: players with western grips
Specs side by side
| Spec | Vortex | Plasma HEXtreme |
|---|---|---|
| Type | Polyester | Polyester |
| Construction | Hexagonal co-polyester monofilament with added softening agents for elasticity | Hexagonal co-polyester monofilament |
| Gauges | 16, 17, 18 | 16L, 17, 18 |
| Stiffness | Medium | Medium high |
| Set price | $7–8 | $10–13 |
| Reel price | $79–79 | $120–145 |
| Arm friendliness | 3/5 · Moderate | 2/5 · Low |
| Cost to maintain | 5/5 | 4/5 |
| Recommended from | Age 13 | Age 13 |
| Levels | Intermediate, Advanced, Elite | Intermediate, Advanced, Elite |
| Play styles | Baseliner, Big hitter, All court | Baseliner, Big hitter |
| Junior tension | 46-52 lbs for juniors. It loses tension early, so many stringers add 2-4 lbs or pre-stretch. | 48-52 lbs for juniors. Hex shape grabs ball - can string lower. |
Vortex in short
Prince Vortex is a shaped co-poly with a hexagonal profile and softening agents in the material. In the Tennis Warehouse playtest its strongest score was spin, and TW notes it has one of the top spin scores in the TWU string lab. Comfort scored very high for a co-poly and power was lively for the type. The trade-off is tension: the TWU lab measured a high tension loss, and testers raised tension and pre-stretched to manage it. At about $8 a set it is one of the cheapest ways to try a spin poly.
Plasma HEXtreme in short
Signum Pro Plasma HEXtreme was one of the first hexagonal shaped strings on the market, pioneering the shaped poly category that has become so popular. The six edges provide excellent ball bite for spin generation while maintaining the tension stability Signum Pro is known for. Built on the proven Plasma foundation with enhanced spin potential, HEXtreme offers German engineering in a modern spin-focused design.
Vortex vs Plasma HEXtreme: quick answers
Which has more spin, Vortex or Plasma HEXtreme?
They tie on our spin rating (9/10 each).
Which is more arm-friendly for a junior?
Prince Vortex scores 3/5 for arm friendliness, against 2/5 for Plasma HEXtreme. It is recommended from age 13.
Which lasts longer?
Prince Vortex rates 8/10 for durability against 7/10.
Which is cheaper?
Vortex costs about $7–8 a set and Plasma HEXtreme about $10–13, at typical retail.
The short answer and the "pick if" lists are generated from our ratings and junior data only. Data verified 2026-10 (Vortex) and 2025-01 (Plasma HEXtreme).