Chapter 2 Trish Scarborough is Chapter 1 Finn Edwards with a facelift, with everything good and bad that implies. They might have the same card pool, but they operate in very different ways.
On the upside, if you enjoy Finn Edwards, Trish Scarborough is functionally identical. In exchange for a slightly worse Elder Sign that provides free movement rather than free clues, Trish Scarborough gets a better signature than Finn's Trusty .38 and a joke of a weakness than joke of a weakness compared to Caught Red-Handed that actively punishes you for evading enemies. Her card pool is also much better than Finn's --- an illicit card pool outside of Rogue never materialized during Chapter 1, whereas new Trish Scarborough still retains access to Seeker 0-2. I'd be hard pressed to justify playing Finn when new Trish exists.
On the downside, new Trish occupies a slightly different niche than old Trish in ways that might provoke some frustration. Old Trish Scarborough can take advantage of enemies to discover additional clues each turn and use clues to automatically evade enemies. Her signature lets her disengage from enemies at fast speed and her elder sign lets her investigate any revealed location, giving her a lot of opportunities for creative applications of her abilities. By contrast, New Trish Scarborough is an Evasion Matters Rogue with extremely powerful fundamentals, a free evasion action each turn, and a free copy of Pickpocketing as her signature. Her ability is more restrictive and less creative, but a free action paired with cards that trigger on evasion can add value rapidly. New Trish takes better advantage of the Rogue card pool, but old Trish is better at using the Seeker card pool. It depends on what flavor of Trish you plan on building.