Both in Semiconductor Manufacturing Equipment

Energy Recovery vs Sono-Tek

Over the past year ERII returned −57.5% and SOTK returned +1.8%; their daily moves had a correlation of 0.08.

ERII −57.5% SOTK +1.8%Growth of $1, one year, split-adjusted
MetricERIISOTK
Price$7.15$4.75
Market cap$364.7M$74.7M
Today−0.35%+0.96%
1 month+0.9%−29.6%
6 months−38.5%−4.7%
Year to date−47.0%+14.9%
1 year−57.5%+1.8%
Revenue growth (YoY)−57.2%+1.3%
Gross margin74.7%52.9%
Net margin−26.7%7.0%
P/E (TTM)23.8×37.3×
Price / sales3.0×3.5×
Net cash$93.1M$17.8M
Dividend yield——
Volatility (60d)32.9%72.1%
Short % of float6.4%0.5%
Next earnings——

Shading marks the stronger figure where one clearly exists (lower is better for valuation and volatility).