Prop Firm Spreads and Execution Quality - Is Anyone Seeing a Discrepancy?

Hey everyone, been grinding away at a few prop firm challenges lately and something's been bugging me. I've been pretty consistent with my own personal trading for years, running a tight ship on execution and managing spreads, especially on pairs like $EURUSD and even some of the more volatile indices.

However, it feels like with some prop firms, even the ones touting 'raw spreads' or 'ECN execution', the reality on the ground is a bit different. I'm seeing wider spreads during active trading hours than I'd typically expect from a top-tier retail broker, and sometimes slippage that just doesn't feel right for the market conditions. It makes me wonder if there's a difference in liquidity providers or if the internal matching engines are just not as robust. Is anyone else experiencing this? Has it impacted your ability to hit profit targets or maintain your typical R:R? Just trying to get a read on whether this is common or if I need to adjust my expectations/strategy for prop firm challenges.