Bosch
Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw
$179
Best Circular Saws · head-to-head
Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw
A sourced, side-by-side comparison. Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw is cheaper at $119. Every spec and price links to its source.
Ryobi
Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw
$119Cheaper
Which is better: the Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw or Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw?
On the specs we track, they're closely matched. The Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw is the cheaper at $119.
See Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw on Amazon See Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw | Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw |
|---|---|---|
| US price | $179 | $119 |
| Brand | Bosch | Ryobi |
| Released | — | — |
| Power source | corded | cordless |
| Blade size (in) | 7-1/4 in | 7-1/4 in |
| Voltage or amps | 15 A | 18 V |
| Max (rpm) | 6200 | 3800 |
| Bevel capacity (°) | 56 deg | 56 deg |
| Brushless | No | Yes |
| Weight (lb) | 10 lb | 6.6 lb |
| Release | — | — |
Sources — Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw: boschtools.com (verified 2026-06-20). Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw: homedepot.com (verified 2026-06-20).
What's the difference between the Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw and Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw?
Where the two actually differ on the specs we track (5 of 7). Matching specs are omitted.
- Power source: Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw corded vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw cordless
- Voltage or amps: Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw 15 A vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 18 V
- Max (rpm): Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw 6200 vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 3800
- Brushless: Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw false vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw true
- Weight (lb): Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw 10 lb vs Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw 6.6 lb
What reviewers say
Sourced tester consensus for each — the "what people who used it think" layer, not just specs.
Bosch CS5 15-Amp 7-1/4 in. Left-Blade Corded Circular Saw
Only one whitelisted tester, Pro Tool Reviews, covers the Bosch CS5, and it is a brief 2010 first-look preview rather than a hands-on lab test, so no independently measured numbers exist. It praises the left-blade line of sight and calls the 15-amp saw one of the best values; no critical testing or negatives are available. (1 sourced review.)
Praised: Left-blade orientation gives a clear line of sight for accurate cutting; Regarded as one of the best values among 15-amp circular saws.
Ryobi P508 ONE+ 18V Brushless 7-1/4 in. Cordless Circular Saw
Only one whitelisted source covers the exact P508: a 2017 pre-launch preview from Pro Tool Reviews, not a hands-on lab test, so no measured results exist. It praises the brushless motor and 26% larger 7-1/4-inch cut capacity as clear upgrades, but flags the doubled price and still-missing rafter hook. (1 sourced review.)
Praised: Brushless motor upgrade for longer runtime, more power, and longer motor life; 26% larger cut capacity from the full-size 7-1/4-inch blade (up from 6-1/2-inch); LED cut-line light, dust blower, and left-mount blade improve cut-line visibility.
Flagged: Price roughly doubles that of the previous P507 model; Still lacks a rafter hook; Left-mount blade is less convenient for left-handed users.