It's a really tough call, but...I would personally say the first six months of 2020 are slightly better than the first half of 2019.
If you're into Animal Crossing and RPGs, then the first half of the year is really enjoyable.
From what I can see, in order, in terms of exclusives (console, timed or not), not counting small titles that Nintendo didn't promote, but counting 3DS...
H1 2019:
- Fitness Boxing
- Mario & Luigi Bowser Inside remake (3DS)
- NSMBU
- Travis Strikes Again
- Etrian Odyssey Nexus (3DS)
- Tetris 99
- Kirby Extra Epic Yarn (3DS)
- Baba is You
- Yoshi's Crafted World
- Super Dragon Ball Heroes
- Labo VR
- Boxboy + Boxgirl
- Persona Q2 (3DS)
- Collection of Mana (old localization)
- Doraemon Story of Seasons
- Cadence of Hyrule
- Yo-kai Watch 4
- Mario Maker 2
+ a few old multiplat ports like Darksiders, Dragon's Dogma, Ace Attorney, FFX/XII, Saints Row 3, RE1/4/0, DMC1, etc, and a few "big" ports like MK11 and Cuphead.
H1 2020:
- Puzzle & Dragons Gold
- Tokyo Mirage Sessions #FE Encore
- Snack World
- DMC3 SE (old port, but with added exclusive features)
- Persona 5 Scramble
- Uniclr
- Pokemon Mystery Dungeon remake
- Animal Crossing
- Xenoblade 1 remake (assuming it's out by the end of June as speculated)
- first Pokemon Sword/Shield DLC
+ a few old multiplat ports like Oddworld Stranger's Wrath, Metro Redux, Naruto Shippuden 4, etc, and a few "big" ports on time like Darksiders Genesis, Fairy tail, Doom 64, OPW4, Trials of Mana, Minecraft Dungeons, Panzer Dragoon remake. And The Outer Worlds (big port, but not on time).
I don't know tbh. 2019 had way more exclusives, but not as big, and less "big" ports. But it also more/bigger old multiplat ports (especially from Capcom), more RPGs if you count the 3DS, and a lot more indie timed exclusives (I didn't put them all here).
It's comparable tbh, just depends on your tastes. I wouldn't say those were remarkable first halves other than a few titles.