The Sagittarius alloy rims have the usual Karoq 8Jx19 ET45 specification.
I suggest you sell them before they get damaged on the kerb.
You should get a good price on ebay if they are not damaged.
They are very prone to kerbing damage because the 8J rims are quite wide for the 225/40R19 tyres, so that the sidewalls don't bulge out much.
19" alloy rims are very heavy. As you can see below, they generally weigh over 13kg.
Here are the weights of some Kodiaq 7Jx19 ET43 rims as given by "skoda eshop cz"
ARONIA 13kg
CRATER 13.5kg
TRIGLAV 14.3kg
Here are the weights of some Karoq 8Jx19 ET45 rims as given by "skoda eshop cz"
CETUS 13.1kg
CRATER 13.9kg
VEGA 13.7kg
Here are the weights of some Karoq 7Jx17 ET45 rims as given by "skoda eshop cz", so maybe around 3kg lighter than the 19" rims.
KUMA 11.1kg
RATIKON 10.1kg/10.9kg
TRITON 10.5kg
However, I've seen some lightweight 7Jx16 ET45 rims from some Audi A4/A6 cars around the years 1997/2003 that only weigh about 7.3kg each. So that would be a weight saving of about 6kg each rim compared to the heavy 19" alloy rims. Together with 225/60R16 tyres (from the Karoq 4WD), they could work quite well on the Karoq. Multiple the weight saving by four, and that's 24kg less unsprung weight or 30kg weight saving if you include the spare wheel.
7Jx16 ET45 5/112 57.1 alloy rims 8D0601025K (weigh only 7.3kg each)
9
8D0601025K
Aluminium rim
7 JX16H2 ET45
5/112
4
PR-C8Y
-
8D0601025K Z17
Avus silver
Back to your original question.
If you consider both 225/45R19 (from the Karoq 4WD) and 235/40R19 (from the Superb MK3), neither are particularly good options. Out of the two, I would probably go for 225/45R19 because at least it's a Karoq standard tyre size. Normally, I would say go for the 235/40R19 but although wider than the 225/45R19 it will still give little protection from kerbing damage. At least the 225/45R19 should roll a little better and give ever so slightly more mpg.
If you like 19" rims, I would go for the much narrower 7Jx19 ET43 rims from the Kodiaq with 225/45R19. Because the rims are so much narrower than 8J, the tyre's sidewalls will bulge out considerably more and therefore should give the rims a modest amount of protection from kerbing damage.
The Karoq is related size wise to the Octavia, and the Octavia up to MK3 used common and cheap tyre sizes. You can still get excellent 195/65R15 for little more than £50 each. Some of the 225/45R19 sizes are close to £200 each. Such is progress.
Of course, the 195/65R15 is no use to Karoq owners, but slightly oversize 215/65R16 rather than the standard Karoq 2WD 215/60R16 would fit.
Vredestein Quatrac 6 195/65R15 91H
https://www.camskill.co.uk/m138b0s7994p202140/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac_6_-_195_65_R15_91H_TL_Fuel_Eff_%3A_C_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_70dB
Vredestein Quatrac 6 215/65R16 98H
https://www.blackcircles.com/catalogue/vredestein/quatrac/215/65/R16/H/98/m?tyre=41007498
Vredestein Quatrac 6 225/60R16 102H XL (standard Karoq 4WD tyre size)
https://www.camskill.co.uk/m139b0s8011p202131/Vredestein_Tyres_All_Season_Car_Vredestein_Quatrac_6_-_225_60_R16_102H_XL_TL_Fuel_Eff_%3A_B_Wet_Grip%3A_B_NoiseClass%3A_B_Noise%3A_71dB
I am using the Vredesteins as examples of good all-season tyres which I've often used myself, but there's many other premium brands of all-season tyres such as Bridgestone, Continental, Goodyear, Hankook, Michelin, etc. that have often done well in tyre reviews.
Outside diameter of tyres
215/65R16 685.9mm (+2.0% compared to 215/50R18)
225/60R16 676.4mm (+0.6% compared to 215/50R18)
215/50R18 672.2mm
225/40R19 662.6mm
225/45R19 685.1mm (+1.9% compared to 215/50R18)
235/40R19 670.9mm