Which is better for fresh flowers?

The Trellis. It holds 38 oz. and its glass body lets you see the water level. The Lattice gives no capacity figure, so you are guessing how much stem room you get.

The Trellis is lead-free glass, which resists staining and staining odors and can go in the dishwasher. The Lattice is glazed ceramic, which is durable but can chip at the rim and has no listed care routine.

Is the Trellis worth stepping up to?

Yes if you care about craft. It is handmade and signed in the Czech Republic, and it is dishwasher safe. The Lattice is a decorative ceramic piece with no comparable provenance.

Can I use either as a standalone decor piece?

Both work empty. The Lattice's open lattice pattern reads more as sculpture; the Trellis reads more as a table vase waiting for flowers.

Which is easier to clean?

The Trellis, which is dishwasher safe on a warm gentle cycle. Hand wash the Lattice, since no care instructions are given and glazed ceramic can dull in a dishwasher.

Juliska Flared Vase vs White Lattice Vase

The Trellis is the better-made vase: lead-free glass, handmade in the Czech Republic, individually signed, and dishwasher safe. The White Lattice is a glazed ceramic decorative piece made in China with an open lattice pattern and no care instructions listed. Buy the Trellis if you want a signed, food-safe glass vase you can actually wash; buy the Lattice if you want a ceramic accent that reads as decor first and a vase second.

Choose the Trellis if you want a signed, handmade glass vase with a ruffled rim that you can put in the dishwasher.
Choose the White Lattice if you want a solid ceramic accent piece with an open lattice pattern for a shelf or table.

Prices

Juliska Flared Vase: $49.99 at Ornate Home (last seen Nov 1)
White Lattice Vase: $46.00 at Sundial Home (last seen Nov 9)
Difference: the White Lattice Vase is $3.99 cheaper than the Juliska Flared Vase at the latest prices (Nov 1 and Nov 9)