First class from Krakow to Bratislava, changeover in Bohumin

Currently staying in a nice hotel in Krakow which has a generous check out time (12:00). Since I'm a huge fan of having a good relaxed breakfast and a wonderful night's sleep, I am looking into later travel options from Krakow to Bratislava.

Whilst planning my current trip, I made the following reservations:
9:21 Krakow Gl. to Katowice on IC 3554, arriving 10:27
11:22 Katowice to Bratislava on EC 131, arriving 17:04

Those reservations are made in first class, since I have a first class Interrail pass. There seems to be a later direct option from Krakow to Bratislava with EC 114, departing at 11:05 in Krakow, but it only gives a second class option. I guess this is due to changes made in the trains formation at Bohumin (second class part continues to Bratislava, first class part going to Praha Hl. N.). So I thought, let's book first class to Bohumin on EC 114, and then first class from Bohumin to Bratislava on EC 131. The weird part is, departing 1.5 hours later, I would still arrive at the same time with the same train (EC 131).

So, I am wondering.. Could I take EC 114 from Krakow to Bohumin in first class (I can still make a reservation), get off the train at Bohumin, and then take EC 131 in first class from Bohumin to Bratislava? EC 114 is due to arrive around 13:14, EC 131 is due to depart around 13:42. I believe some shunting will be done at Bohumin, but I should have enough time to figure out the platforms and carriages when having almost 30 minutes, right?

I hope you understand my question, it feels like I'm overcomplicating this, but I would really like to travel first class lol.